--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/unix/native/libjli/java_md_solinux.c Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,818 @@
+/*
+ * Copyright (c) 1998, 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include "java.h"
+#include "jvm_md.h"
+#include <dirent.h>
+#include <dlfcn.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include "manifest_info.h"
+
+
+#define JVM_DLL "libjvm.so"
+#define JAVA_DLL "libjava.so"
+#ifdef AIX
+#define LD_LIBRARY_PATH "LIBPATH"
+#else
+#define LD_LIBRARY_PATH "LD_LIBRARY_PATH"
+#endif
+
+/* help jettison the LD_LIBRARY_PATH settings in the future */
+#ifndef SETENV_REQUIRED
+#define SETENV_REQUIRED
+#endif
+
+#ifdef __solaris__
+# include <sys/systeminfo.h>
+# include <sys/elf.h>
+# include <stdio.h>
+#endif
+
+/*
+ * Flowchart of launcher execs and options processing on unix
+ *
+ * The selection of the proper vm shared library to open depends on
+ * several classes of command line options, including vm "flavor"
+ * options (-client, -server).
+ * The vm selection options are not passed to the running
+ * virtual machine; they must be screened out by the launcher.
+ *
+ * The version specification (if any) is processed first by the
+ * platform independent routine SelectVersion. This may result in
+ * the exec of the specified launcher version.
+ *
+ * Previously the launcher modified the LD_LIBRARY_PATH appropriately for the
+ * desired data model path, regardless if data models matched or not. The
+ * launcher subsequently exec'ed the desired executable, in order to make the
+ * LD_LIBRARY_PATH path available, for the runtime linker.
+ *
+ * Now, in most cases,the launcher will dlopen the target libjvm.so. All
+ * required libraries are loaded by the runtime linker, using the
+ * $RPATH/$ORIGIN baked into the shared libraries at compile time. Therefore,
+ * in most cases, the launcher will only exec, if the data models are
+ * mismatched, and will not set any environment variables, regardless of the
+ * data models.
+ *
+ * However, if the environment contains a LD_LIBRARY_PATH, this will cause the
+ * launcher to inspect the LD_LIBRARY_PATH. The launcher will check
+ * a. if the LD_LIBRARY_PATH's first component is the path to the desired
+ * libjvm.so
+ * b. if any other libjvm.so is found in any of the paths.
+ * If case b is true, then the launcher will set the LD_LIBRARY_PATH to the
+ * desired JRE and reexec, in order to propagate the environment.
+ *
+ * Main
+ * (incoming argv)
+ * |
+ * \|/
+ * CreateExecutionEnvironment
+ * (determines desired data model)
+ * |
+ * |
+ * \|/
+ * Have Desired Model ? --> NO --> Exit(with error)
+ * |
+ * |
+ * \|/
+ * YES
+ * |
+ * |
+ * \|/
+ * CheckJvmType
+ * (removes -client, -server, etc.)
+ * |
+ * |
+ * \|/
+ * TranslateDashJArgs...
+ * (Prepare to pass args to vm)
+ * |
+ * |
+ * \|/
+ * ParseArguments
+ * |
+ * |
+ * \|/
+ * RequiresSetenv
+ * Is LD_LIBRARY_PATH
+ * and friends set ? --> NO --> Continue
+ * YES
+ * |
+ * |
+ * \|/
+ * Path is desired JRE ? YES --> Continue
+ * NO
+ * |
+ * |
+ * \|/
+ * Paths have well known
+ * jvm paths ? --> NO --> Error/Exit
+ * YES
+ * |
+ * |
+ * \|/
+ * Does libjvm.so exist
+ * in any of them ? --> NO --> Continue
+ * YES
+ * |
+ * |
+ * \|/
+ * Set the LD_LIBRARY_PATH
+ * |
+ * |
+ * \|/
+ * Re-exec
+ * |
+ * |
+ * \|/
+ * Main
+ */
+
+/* Store the name of the executable once computed */
+static char *execname = NULL;
+
+/*
+ * execname accessor from other parts of platform dependent logic
+ */
+const char *
+GetExecName() {
+ return execname;
+}
+
+#ifdef SETENV_REQUIRED
+static jboolean
+JvmExists(const char *path) {
+ char tmp[PATH_MAX + 1];
+ struct stat statbuf;
+ JLI_Snprintf(tmp, PATH_MAX, "%s/%s", path, JVM_DLL);
+ if (stat(tmp, &statbuf) == 0) {
+ return JNI_TRUE;
+ }
+ return JNI_FALSE;
+}
+/*
+ * contains a lib/{server,client}/libjvm.so ?
+ */
+static jboolean
+ContainsLibJVM(const char *env) {
+ /* the usual suspects */
+ char clientPattern[] = "lib/client";
+ char serverPattern[] = "lib/server";
+ char *envpath;
+ char *path;
+ jboolean clientPatternFound;
+ jboolean serverPatternFound;
+
+ /* fastest path */
+ if (env == NULL) {
+ return JNI_FALSE;
+ }
+
+ /* to optimize for time, test if any of our usual suspects are present. */
+ clientPatternFound = JLI_StrStr(env, clientPattern) != NULL;
+ serverPatternFound = JLI_StrStr(env, serverPattern) != NULL;
+ if (clientPatternFound == JNI_FALSE && serverPatternFound == JNI_FALSE) {
+ return JNI_FALSE;
+ }
+
+ /*
+ * we have a suspicious path component, check if it contains a libjvm.so
+ */
+ envpath = JLI_StringDup(env);
+ for (path = JLI_StrTok(envpath, ":"); path != NULL; path = JLI_StrTok(NULL, ":")) {
+ if (clientPatternFound && JLI_StrStr(path, clientPattern) != NULL) {
+ if (JvmExists(path)) {
+ JLI_MemFree(envpath);
+ return JNI_TRUE;
+ }
+ }
+ if (serverPatternFound && JLI_StrStr(path, serverPattern) != NULL) {
+ if (JvmExists(path)) {
+ JLI_MemFree(envpath);
+ return JNI_TRUE;
+ }
+ }
+ }
+ JLI_MemFree(envpath);
+ return JNI_FALSE;
+}
+
+/*
+ * Test whether the environment variable needs to be set, see flowchart.
+ */
+static jboolean
+RequiresSetenv(const char *jvmpath) {
+ char jpath[PATH_MAX + 1];
+ char *llp;
+ char *dmllp = NULL;
+ char *p; /* a utility pointer */
+
+#ifdef AIX
+ /* We always have to set the LIBPATH on AIX because ld doesn't support $ORIGIN. */
+ return JNI_TRUE;
+#endif
+
+ llp = getenv("LD_LIBRARY_PATH");
+#ifdef __solaris__
+ dmllp = getenv("LD_LIBRARY_PATH_64");
+#endif /* __solaris__ */
+ /* no environment variable is a good environment variable */
+ if (llp == NULL && dmllp == NULL) {
+ return JNI_FALSE;
+ }
+#ifdef __linux
+ /*
+ * On linux, if a binary is running as sgid or suid, glibc sets
+ * LD_LIBRARY_PATH to the empty string for security purposes. (In contrast,
+ * on Solaris the LD_LIBRARY_PATH variable for a privileged binary does not
+ * lose its settings; but the dynamic linker does apply more scrutiny to the
+ * path.) The launcher uses the value of LD_LIBRARY_PATH to prevent an exec
+ * loop, here and further downstream. Therefore, if we are running sgid or
+ * suid, this function's setting of LD_LIBRARY_PATH will be ineffective and
+ * we should case a return from the calling function. Getting the right
+ * libraries will be handled by the RPATH. In reality, this check is
+ * redundant, as the previous check for a non-null LD_LIBRARY_PATH will
+ * return back to the calling function forthwith, it is left here to safe
+ * guard against any changes, in the glibc's existing security policy.
+ */
+ if ((getgid() != getegid()) || (getuid() != geteuid())) {
+ return JNI_FALSE;
+ }
+#endif /* __linux */
+
+ /*
+ * Prevent recursions. Since LD_LIBRARY_PATH is the one which will be set by
+ * previous versions of the JRE, thus it is the only path that matters here.
+ * So we check to see if the desired JRE is set.
+ */
+ JLI_StrNCpy(jpath, jvmpath, PATH_MAX);
+ p = JLI_StrRChr(jpath, '/');
+ *p = '\0';
+ if (llp != NULL && JLI_StrNCmp(llp, jpath, JLI_StrLen(jpath)) == 0) {
+ return JNI_FALSE;
+ }
+
+ /* scrutinize all the paths further */
+ if (llp != NULL && ContainsLibJVM(llp)) {
+ return JNI_TRUE;
+ }
+ if (dmllp != NULL && ContainsLibJVM(dmllp)) {
+ return JNI_TRUE;
+ }
+ return JNI_FALSE;
+}
+#endif /* SETENV_REQUIRED */
+
+void
+CreateExecutionEnvironment(int *pargc, char ***pargv,
+ char jrepath[], jint so_jrepath,
+ char jvmpath[], jint so_jvmpath,
+ char jvmcfg[], jint so_jvmcfg) {
+
+ char * jvmtype = NULL;
+ int argc = *pargc;
+ char **argv = *pargv;
+
+#ifdef SETENV_REQUIRED
+ jboolean mustsetenv = JNI_FALSE;
+ char *runpath = NULL; /* existing effective LD_LIBRARY_PATH setting */
+ char* new_runpath = NULL; /* desired new LD_LIBRARY_PATH string */
+ char* newpath = NULL; /* path on new LD_LIBRARY_PATH */
+ char* lastslash = NULL;
+ char** newenvp = NULL; /* current environment */
+ size_t new_runpath_size;
+#endif /* SETENV_REQUIRED */
+
+ /* Compute/set the name of the executable */
+ SetExecname(*pargv);
+
+ /* Check to see if the jvmpath exists */
+ /* Find out where the JRE is that we will be using. */
+ if (!GetJREPath(jrepath, so_jrepath, JNI_FALSE)) {
+ JLI_ReportErrorMessage(JRE_ERROR1);
+ exit(2);
+ }
+ JLI_Snprintf(jvmcfg, so_jvmcfg, "%s%slib%sjvm.cfg",
+ jrepath, FILESEP, FILESEP);
+ /* Find the specified JVM type */
+ if (ReadKnownVMs(jvmcfg, JNI_FALSE) < 1) {
+ JLI_ReportErrorMessage(CFG_ERROR7);
+ exit(1);
+ }
+
+ jvmpath[0] = '\0';
+ jvmtype = CheckJvmType(pargc, pargv, JNI_FALSE);
+ if (JLI_StrCmp(jvmtype, "ERROR") == 0) {
+ JLI_ReportErrorMessage(CFG_ERROR9);
+ exit(4);
+ }
+
+ if (!GetJVMPath(jrepath, jvmtype, jvmpath, so_jvmpath)) {
+ JLI_ReportErrorMessage(CFG_ERROR8, jvmtype, jvmpath);
+ exit(4);
+ }
+ /*
+ * we seem to have everything we need, so without further ado
+ * we return back, otherwise proceed to set the environment.
+ */
+#ifdef SETENV_REQUIRED
+ mustsetenv = RequiresSetenv(jvmpath);
+ JLI_TraceLauncher("mustsetenv: %s\n", mustsetenv ? "TRUE" : "FALSE");
+
+ if (mustsetenv == JNI_FALSE) {
+ return;
+ }
+#else
+ return;
+#endif /* SETENV_REQUIRED */
+
+#ifdef SETENV_REQUIRED
+ if (mustsetenv) {
+ /*
+ * We will set the LD_LIBRARY_PATH as follows:
+ *
+ * o $JVMPATH (directory portion only)
+ * o $JRE/lib
+ * o $JRE/../lib
+ *
+ * followed by the user's previous effective LD_LIBRARY_PATH, if
+ * any.
+ */
+
+ runpath = getenv(LD_LIBRARY_PATH);
+
+ /* runpath contains current effective LD_LIBRARY_PATH setting */
+ { /* New scope to declare local variable */
+ char *new_jvmpath = JLI_StringDup(jvmpath);
+ new_runpath_size = ((runpath != NULL) ? JLI_StrLen(runpath) : 0) +
+ 2 * JLI_StrLen(jrepath) +
+#ifdef AIX
+ /* On AIX we additionally need 'jli' in the path because ld doesn't support $ORIGIN. */
+ JLI_StrLen(jrepath) + JLI_StrLen("/lib//jli:") +
+#endif
+ JLI_StrLen(new_jvmpath) + 52;
+ new_runpath = JLI_MemAlloc(new_runpath_size);
+ newpath = new_runpath + JLI_StrLen(LD_LIBRARY_PATH "=");
+
+
+ /*
+ * Create desired LD_LIBRARY_PATH value for target data model.
+ */
+ {
+ /* remove the name of the .so from the JVM path */
+ lastslash = JLI_StrRChr(new_jvmpath, '/');
+ if (lastslash)
+ *lastslash = '\0';
+
+ sprintf(new_runpath, LD_LIBRARY_PATH "="
+ "%s:"
+ "%s/lib:"
+#ifdef AIX
+ "%s/lib/jli:" /* Needed on AIX because ld doesn't support $ORIGIN. */
+#endif
+ "%s/../lib",
+ new_jvmpath,
+ jrepath,
+#ifdef AIX
+ jrepath,
+#endif
+ jrepath
+ );
+
+ JLI_MemFree(new_jvmpath);
+
+ /*
+ * Check to make sure that the prefix of the current path is the
+ * desired environment variable setting, though the RequiresSetenv
+ * checks if the desired runpath exists, this logic does a more
+ * comprehensive check.
+ */
+ if (runpath != NULL &&
+ JLI_StrNCmp(newpath, runpath, JLI_StrLen(newpath)) == 0 &&
+ (runpath[JLI_StrLen(newpath)] == 0 ||
+ runpath[JLI_StrLen(newpath)] == ':')) {
+ JLI_MemFree(new_runpath);
+ return;
+ }
+ }
+ }
+
+ /*
+ * Place the desired environment setting onto the prefix of
+ * LD_LIBRARY_PATH. Note that this prevents any possible infinite
+ * loop of execv() because we test for the prefix, above.
+ */
+ if (runpath != 0) {
+ /* ensure storage for runpath + colon + NULL */
+ if ((JLI_StrLen(runpath) + 1 + 1) > new_runpath_size) {
+ JLI_ReportErrorMessageSys(JRE_ERROR11);
+ exit(1);
+ }
+ JLI_StrCat(new_runpath, ":");
+ JLI_StrCat(new_runpath, runpath);
+ }
+
+ if (putenv(new_runpath) != 0) {
+ /* problem allocating memory; LD_LIBRARY_PATH not set properly */
+ exit(1);
+ }
+
+ /*
+ * Unix systems document that they look at LD_LIBRARY_PATH only
+ * once at startup, so we have to re-exec the current executable
+ * to get the changed environment variable to have an effect.
+ */
+
+ newenvp = environ;
+ }
+#endif /* SETENV_REQUIRED */
+ {
+ char *newexec = execname;
+ JLI_TraceLauncher("TRACER_MARKER:About to EXEC\n");
+ (void) fflush(stdout);
+ (void) fflush(stderr);
+#ifdef SETENV_REQUIRED
+ if (mustsetenv) {
+ execve(newexec, argv, newenvp);
+ } else {
+ execv(newexec, argv);
+ }
+#else /* !SETENV_REQUIRED */
+ execv(newexec, argv);
+#endif /* SETENV_REQUIRED */
+ JLI_ReportErrorMessageSys(JRE_ERROR4, newexec);
+ }
+ exit(1);
+}
+
+
+static jboolean
+GetJVMPath(const char *jrepath, const char *jvmtype,
+ char *jvmpath, jint jvmpathsize)
+{
+ struct stat s;
+
+ if (JLI_StrChr(jvmtype, '/')) {
+ JLI_Snprintf(jvmpath, jvmpathsize, "%s/" JVM_DLL, jvmtype);
+ } else {
+ JLI_Snprintf(jvmpath, jvmpathsize, "%s/lib/%s/" JVM_DLL, jrepath, jvmtype);
+ }
+
+ JLI_TraceLauncher("Does `%s' exist ... ", jvmpath);
+
+ if (stat(jvmpath, &s) == 0) {
+ JLI_TraceLauncher("yes.\n");
+ return JNI_TRUE;
+ } else {
+ JLI_TraceLauncher("no.\n");
+ return JNI_FALSE;
+ }
+}
+
+/*
+ * Find path to JRE based on .exe's location or registry settings.
+ */
+static jboolean
+GetJREPath(char *path, jint pathsize, jboolean speculative)
+{
+ char libjava[MAXPATHLEN];
+ struct stat s;
+
+ if (GetApplicationHome(path, pathsize)) {
+ /* Is JRE co-located with the application? */
+ JLI_Snprintf(libjava, sizeof(libjava), "%s/lib/" JAVA_DLL, path);
+ if (access(libjava, F_OK) == 0) {
+ JLI_TraceLauncher("JRE path is %s\n", path);
+ return JNI_TRUE;
+ }
+ /* ensure storage for path + /jre + NULL */
+ if ((JLI_StrLen(path) + 4 + 1) > (size_t) pathsize) {
+ JLI_TraceLauncher("Insufficient space to store JRE path\n");
+ return JNI_FALSE;
+ }
+ /* Does the app ship a private JRE in <apphome>/jre directory? */
+ JLI_Snprintf(libjava, sizeof(libjava), "%s/jre/lib/" JAVA_DLL, path);
+ if (access(libjava, F_OK) == 0) {
+ JLI_StrCat(path, "/jre");
+ JLI_TraceLauncher("JRE path is %s\n", path);
+ return JNI_TRUE;
+ }
+ }
+
+ if (GetApplicationHomeFromDll(path, pathsize)) {
+ JLI_Snprintf(libjava, sizeof(libjava), "%s/lib/" JAVA_DLL, path);
+ if (stat(libjava, &s) == 0) {
+ JLI_TraceLauncher("JRE path is %s\n", path);
+ return JNI_TRUE;
+ }
+ }
+
+ if (!speculative)
+ JLI_ReportErrorMessage(JRE_ERROR8 JAVA_DLL);
+ return JNI_FALSE;
+}
+
+jboolean
+LoadJavaVM(const char *jvmpath, InvocationFunctions *ifn)
+{
+ void *libjvm;
+
+ JLI_TraceLauncher("JVM path is %s\n", jvmpath);
+
+ libjvm = dlopen(jvmpath, RTLD_NOW + RTLD_GLOBAL);
+ if (libjvm == NULL) {
+#if defined(__solaris__) && defined(__sparc) && !defined(_LP64) /* i.e. 32-bit sparc */
+ FILE * fp;
+ Elf32_Ehdr elf_head;
+ int count;
+ int location;
+
+ fp = fopen(jvmpath, "r");
+ if (fp == NULL) {
+ JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
+ return JNI_FALSE;
+ }
+
+ /* read in elf header */
+ count = fread((void*)(&elf_head), sizeof(Elf32_Ehdr), 1, fp);
+ fclose(fp);
+ if (count < 1) {
+ JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
+ return JNI_FALSE;
+ }
+
+ /*
+ * Check for running a server vm (compiled with -xarch=v8plus)
+ * on a stock v8 processor. In this case, the machine type in
+ * the elf header would not be included the architecture list
+ * provided by the isalist command, which is turn is gotten from
+ * sysinfo. This case cannot occur on 64-bit hardware and thus
+ * does not have to be checked for in binaries with an LP64 data
+ * model.
+ */
+ if (elf_head.e_machine == EM_SPARC32PLUS) {
+ char buf[257]; /* recommended buffer size from sysinfo man
+ page */
+ long length;
+ char* location;
+
+ length = sysinfo(SI_ISALIST, buf, 257);
+ if (length > 0) {
+ location = JLI_StrStr(buf, "sparcv8plus ");
+ if (location == NULL) {
+ JLI_ReportErrorMessage(JVM_ERROR3);
+ return JNI_FALSE;
+ }
+ }
+ }
+#endif
+ JLI_ReportErrorMessage(DLL_ERROR1, __LINE__);
+ JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
+ return JNI_FALSE;
+ }
+
+ ifn->CreateJavaVM = (CreateJavaVM_t)
+ dlsym(libjvm, "JNI_CreateJavaVM");
+ if (ifn->CreateJavaVM == NULL) {
+ JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
+ return JNI_FALSE;
+ }
+
+ ifn->GetDefaultJavaVMInitArgs = (GetDefaultJavaVMInitArgs_t)
+ dlsym(libjvm, "JNI_GetDefaultJavaVMInitArgs");
+ if (ifn->GetDefaultJavaVMInitArgs == NULL) {
+ JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
+ return JNI_FALSE;
+ }
+
+ ifn->GetCreatedJavaVMs = (GetCreatedJavaVMs_t)
+ dlsym(libjvm, "JNI_GetCreatedJavaVMs");
+ if (ifn->GetCreatedJavaVMs == NULL) {
+ JLI_ReportErrorMessage(DLL_ERROR2, jvmpath, dlerror());
+ return JNI_FALSE;
+ }
+
+ return JNI_TRUE;
+}
+
+/*
+ * Compute the name of the executable
+ *
+ * In order to re-exec securely we need the absolute path of the
+ * executable. On Solaris getexecname(3c) may not return an absolute
+ * path so we use dladdr to get the filename of the executable and
+ * then use realpath to derive an absolute path. From Solaris 9
+ * onwards the filename returned in DL_info structure from dladdr is
+ * an absolute pathname so technically realpath isn't required.
+ * On Linux we read the executable name from /proc/self/exe.
+ * As a fallback, and for platforms other than Solaris and Linux,
+ * we use FindExecName to compute the executable name.
+ */
+const char*
+SetExecname(char **argv)
+{
+ char* exec_path = NULL;
+#if defined(__solaris__)
+ {
+ Dl_info dlinfo;
+ int (*fptr)();
+
+ fptr = (int (*)())dlsym(RTLD_DEFAULT, "main");
+ if (fptr == NULL) {
+ JLI_ReportErrorMessage(DLL_ERROR3, dlerror());
+ return JNI_FALSE;
+ }
+
+ if (dladdr((void*)fptr, &dlinfo)) {
+ char *resolved = (char*)JLI_MemAlloc(PATH_MAX+1);
+ if (resolved != NULL) {
+ exec_path = realpath(dlinfo.dli_fname, resolved);
+ if (exec_path == NULL) {
+ JLI_MemFree(resolved);
+ }
+ }
+ }
+ }
+#elif defined(__linux__)
+ {
+ const char* self = "/proc/self/exe";
+ char buf[PATH_MAX+1];
+ int len = readlink(self, buf, PATH_MAX);
+ if (len >= 0) {
+ buf[len] = '\0'; /* readlink(2) doesn't NUL terminate */
+ exec_path = JLI_StringDup(buf);
+ }
+ }
+#else /* !__solaris__ && !__linux__ */
+ {
+ /* Not implemented */
+ }
+#endif
+
+ if (exec_path == NULL) {
+ exec_path = FindExecName(argv[0]);
+ }
+ execname = exec_path;
+ return exec_path;
+}
+
+/* --- Splash Screen shared library support --- */
+static const char* SPLASHSCREEN_SO = JNI_LIB_NAME("splashscreen");
+static void* hSplashLib = NULL;
+
+void* SplashProcAddress(const char* name) {
+ if (!hSplashLib) {
+ int ret;
+ char jrePath[MAXPATHLEN];
+ char splashPath[MAXPATHLEN];
+
+ if (!GetJREPath(jrePath, sizeof(jrePath), JNI_FALSE)) {
+ JLI_ReportErrorMessage(JRE_ERROR1);
+ return NULL;
+ }
+ ret = JLI_Snprintf(splashPath, sizeof(splashPath), "%s/lib/%s",
+ jrePath, SPLASHSCREEN_SO);
+
+ if (ret >= (int) sizeof(splashPath)) {
+ JLI_ReportErrorMessage(JRE_ERROR11);
+ return NULL;
+ }
+ if (ret < 0) {
+ JLI_ReportErrorMessage(JRE_ERROR13);
+ return NULL;
+ }
+ hSplashLib = dlopen(splashPath, RTLD_LAZY | RTLD_GLOBAL);
+ JLI_TraceLauncher("Info: loaded %s\n", splashPath);
+ }
+ if (hSplashLib) {
+ void* sym = dlsym(hSplashLib, name);
+ return sym;
+ } else {
+ return NULL;
+ }
+}
+
+void SplashFreeLibrary() {
+ if (hSplashLib) {
+ dlclose(hSplashLib);
+ hSplashLib = NULL;
+ }
+}
+
+/*
+ * Block current thread and continue execution in a new thread
+ */
+int
+ContinueInNewThread0(int (JNICALL *continuation)(void *), jlong stack_size, void * args) {
+ int rslt;
+#ifndef __solaris__
+ pthread_t tid;
+ pthread_attr_t attr;
+ pthread_attr_init(&attr);
+ pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
+
+ if (stack_size > 0) {
+ pthread_attr_setstacksize(&attr, stack_size);
+ }
+ pthread_attr_setguardsize(&attr, 0); // no pthread guard page on java threads
+
+ if (pthread_create(&tid, &attr, (void *(*)(void*))continuation, (void*)args) == 0) {
+ void * tmp;
+ pthread_join(tid, &tmp);
+ rslt = (int)(intptr_t)tmp;
+ } else {
+ /*
+ * Continue execution in current thread if for some reason (e.g. out of
+ * memory/LWP) a new thread can't be created. This will likely fail
+ * later in continuation as JNI_CreateJavaVM needs to create quite a
+ * few new threads, anyway, just give it a try..
+ */
+ rslt = continuation(args);
+ }
+
+ pthread_attr_destroy(&attr);
+#else /* __solaris__ */
+ thread_t tid;
+ long flags = 0;
+ if (thr_create(NULL, stack_size, (void *(*)(void *))continuation, args, flags, &tid) == 0) {
+ void * tmp;
+ thr_join(tid, NULL, &tmp);
+ rslt = (int)(intptr_t)tmp;
+ } else {
+ /* See above. Continue in current thread if thr_create() failed */
+ rslt = continuation(args);
+ }
+#endif /* !__solaris__ */
+ return rslt;
+}
+
+/* Coarse estimation of number of digits assuming the worst case is a 64-bit pid. */
+#define MAX_PID_STR_SZ 20
+
+void SetJavaLauncherPlatformProps() {
+ /* Linux only */
+#ifdef __linux__
+ const char *substr = "-Dsun.java.launcher.pid=";
+ char *pid_prop_str = (char *)JLI_MemAlloc(JLI_StrLen(substr) + MAX_PID_STR_SZ + 1);
+ sprintf(pid_prop_str, "%s%d", substr, getpid());
+ AddOption(pid_prop_str, NULL);
+#endif /* __linux__ */
+}
+
+int
+JVMInit(InvocationFunctions* ifn, jlong threadStackSize,
+ int argc, char **argv,
+ int mode, char *what, int ret)
+{
+ ShowSplashScreen();
+ return ContinueInNewThread(ifn, threadStackSize, argc, argv, mode, what, ret);
+}
+
+void
+PostJVMInit(JNIEnv *env, jclass mainClass, JavaVM *vm)
+{
+ // stubbed out for windows and *nixes.
+}
+
+void
+RegisterThread()
+{
+ // stubbed out for windows and *nixes.
+}
+
+/*
+ * on unix, we return a false to indicate this option is not applicable
+ */
+jboolean
+ProcessPlatformOption(const char *arg)
+{
+ return JNI_FALSE;
+}